DROP FULLTEXT CATALOG (Transact-SQL)
Removes a full-text catalog from a database. You must drop all full-text indexes associated with the catalog before you drop the catalog.
DROP FULLTEXT CATALOG catalog_name
Is the name of the catalog to be removed. If catalog_name does not exist, Microsoft SQL Server returns an error and does not perform the DROP operation. The filegroup of the full-text catalog must not be marked OFFLINE or READONLY for the command to succeed.
User must have DROP permission on the full-text catalog or be a member of the db_owner, or db_ddladmin fixed database roles.